But some hybrids would still be allowed, Mr Johnson confirmed.
It is part of what the prime minister calls a “green industrial revolution” to tackle climate change and create jobs in industries such as nuclear.
Critics of the plan say the £4bn allocated is far too small for the scale of the challenge.
The total amount of new money announced in the package is a 25th of the projected £100bn cost of high-speed rail, HS2.
The government says it is part of a broader £12bn package of public investment that is expected to draw in much more private sector funding.
A Downing Street source said it would send a clear signal to investors where to put their money for the future.
The plan includes provision for a large nuclear plant – likely to be at Sizewell in Suffolk – and for advanced small nuclear reactors, which it is hoped, will create an estimated 10,000 jobs at Rolls-Royce and other firms.
The government hopes that as many as 250,000 jobs will be created overall – especially in the north of England and in Wales, with 60,000 in offshore wind.
The government will bring forward, to 2023, the date by which new homes will need to be cosy without using gas heating.
It will aim to install 600,000 heat pumps a year by 2028 – these are low-energy electrical devices for warming homes.
And it has extended the Green Homes Grant for home insulation for a year after the first tranche was massively over-subscribed.
Clean hydrogen will be blended into the natural gas supply to reduce overall emissions from gas, and the government is seeking a town to volunteer for a trial of 100% hydrogen for heat, industry and cooking.
The hydrogen – attracting a subsidy of up to £500m – will be produced in places such as north-east England, partly by energy from offshore wind.
The government wants to breathe new life into de-industrialised areas by teaming hydrogen production with the manufacture of wind turbines, and with four clusters of firms using carbon capture and storage.
This is when emissions from chimneys are captured and forced into rocks underground. The hope is to transform depressed areas into high-tech hubs. This will get funding of an extra £200m.
Another key point of the plan is a £1.3bn investment in electric vehicle (EV) charging points. Grants for EV buyers will stretch to £582m to help people make the transition.
There is also nearly £500m for battery manufacture in the Midlands and north-east England.
In the greener-than-thou race on the roads, the UK is now in second place after Norway, with its fossil fuel vehicle abolition date of 2025.
UK car makers have warned about the scale of the challenge, but the government believes that forcing technological change can give firms a competitive edge.
Mr Johnson said he hoped his policies would create and support up to 250,000 UK jobs.
Experts said the £4bn would go a long way if it were spent on labour-intensive insulation, but not far if ploughed into expensive, mechanised carbon capture.
The prime minister said: “My 10-point plan will create, support and protect hundreds of thousands of green jobs, whilst making strides towards net zero by 2050.
“Our green industrial revolution will be powered by the wind turbines of Scotland and the North East, propelled by the electric vehicles made in the Midlands and advanced by the latest technologies developed in Wales, so we can look ahead to a more prosperous, greener future.”
The prime minister made it clear that his plans aim to create jobs and address climate change at the same time. This time next year he will host an international climate summit in Glasgow, known as COP.
The COP – or COP26 UN summit, which was postponed by 12 months because of the pandemic – is seen as the most important round of talks to tackle climate change since the Paris Agreement in 2015.
The plans are aimed to put the UK on track to meet its goal of net zero emissions by 2050.
- Offshore wind: Produce enough offshore wind to power every home in the UK, quadrupling how much it produces to 40 gigawatts by 2030, and supporting up to 60,000 jobs.
- Hydrogen: Have five gigawatts of “low carbon” hydrogen production capacity by 2030 – for industry, transport, power and homes – and develop the first town heated by the gas by the end of the decade.
- Nuclear: Pushing nuclear power as a clean energy source and including provision for a large nuclear plant, as well as for advanced small nuclear reactors, which could support 10,000 jobs.
- Electric vehicles: Phasing out sales of new petrol and diesel cars and vans by 2030 to accelerate the transition to electric vehicles and investing in grants to help buy cars and charge point infrastructure.
- Public transport, cycling and walking: Making cycling and walking more attractive ways to travel and investing in zero-emission public transport for the future.
- Jet zero and greener maritime: Supporting research projects for zero-emission planes and ships.
- Homes and public buildings: Making homes, schools and hospitals greener, warmer and more energy efficient, including a target to install 600,000 heat pumps every year by 2028.
- Carbon capture: Developing world-leading technology to capture and store harmful emissions away from the atmosphere, with a target to remove 10 million tonnes of carbon dioxide by 2030 – equivalent to all emissions of the industrial Humber.
- Nature: Protecting and restoring the natural environment, with plans to include planting 30,000 hectares of trees a year.
- Innovation and finance: Developing cutting-edge technologies and making the City of London the global centre of green finance.
“Only a fraction of the funding announced today is new.
“We don’t need rebadged funding pots and reheated pledges, but an ambitious plan that meets the scale of the task we are facing and – crucially – creates jobs now,” the Labour MP said.
He said Labour wanted the government to bring forward £30bn of capital investment over the next 18 months and invest it in low-carbon sectors to support 400,000 additional jobs.
“Make no mistake,” he said, “this announcement from the government falls well short of what is required.”
The Green Party called for a transformation of the entire economy to reduce emissions, including scrapping the £27bn road-building programme, which will actually increase emissions.
Mike Hulme, professor of Human Geography at the University of Cambridge, said critics shouldn’t “nit-pick about precise details” of the plan as it was “far more important is to endorse the direction of travel that has been set for the next decade”.
He said: “The significance of this plan lies in the fact that this is a Conservative government committing substantial amounts of public money to secure medium and long-term welfare and environmental goals.”
Tanya Steele from WWF-UK said the government had “fired the starting gun on the action we need to see”.
She added: “We now need the chancellor to live up to the ambition expressed today through a spending review that tests every line of public spending to ensure it’s compatible with meeting our climate goals.”
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